Platform-specific documentation/Opengear Serial Consoles

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  • We use the Opengear CM4148. This is the 48 port version of the serial console server.
  • It is just easier to get the maximum port model than juggle various models per datacenter deployment.
  • As a matter of course, we attach all network devices, and all power strips to the serial console in each deployment.
  • Please note caching deployments don't offer connections to power strips, only full deployment sites.

Using the Serial Console

  • SSH into the serial console in question.
  • Our naming standard depends on deployment.
  • Full deployments are scs-$rack-$site.mgmt.$site.wmnet
  • noting the rack location when we have multiple racks is just easier on folks.
  • Caching deployments are scs-$site.mgmt.$site.wmnet
  • Since caching sites usually are less than 5 racks and won't ever need more than a single serial console.
  • Once on opengear CLI, type in pmshell and hit enter.
  • All the setup ports with labels of what they are connected to will be listed, and you can enter the number of the port you wish to connect to.
  • If you already know the port # you can simply connect with pmshell port##

Administrative Actions

  • All of the actions listed below require the HTTPS web console, not the command line via SSH.

Initial Setup

  • This is done by the on-site technician for the datacenter deployment.
  • Set up your local laptop to use IP addresses within the 192.168.1.X range (leave open, as the opengear defaults to that) with a subnet mask of and no gateway.
  • No gateway ensures your wifi connection to internet/irc/whatever remains active and primary for that traffic.
  • Plug your laptop's network connection into the LAN port on the serial console server.
  • Open the serial console web configuration via [1].
  • You will have to accept the console's self signed certificate.
  • Login with the default user name root & the default password default
  • Update the console's host name under System > Administration.
  • Update the console's password to our mgmt password under System > Administration.
  • Set the systems network settings under System > IP.
  • The information for the network settings should be attached to the setup ticket for the console in RT.
  • All basic networking and login should now be set. All that is left is to setup individual ports, outlined below.

Port / Connection Setup

  • The SCS exists on the management network, to connect to it, you must be attached to the mgmt network by physical link, or proxy.
  • Once logged in, click on Serial & Network > Serial Port
  • This lists all ports, and their labels.
  • Click Edit for the specific port, and set the port details.
  • The name must be set (or it won't show in pmshell command from cli), the ports default connection settings (no logging, 9600-8-N-1, no flow control) are appropriate for the majority of our network gear and power strips.
  • Apply/Save and the port is now setup.

External Links